System and method of foveated rendering of omnidirectional media content

A system, comprising:

• at least one processor configured to perform a method of foveated rendering of omnidirectional media content, the method comprising:
• receiving, from a client device, a request to access a stream of media data associated with the omnidirectional media content at a point in time the client is accessing the stream of media data for foveated rendering of the omnidirectional media content, wherein the request comprises adaptation parameters for foveated rendering in a CTA WAVE Common Media Client Data (CMCD) format;
• determining an initial portion of media data, starting from the point in time the client requests to access, for foveated rendering of the omnidirectional media content for delivery to the client device;
• defining a time metadata track for a foveated viewport, the time metadata track indicating the viewport that is foveated rendered or should be displayed using foveated rendering according to metadata carried within the time metadata track, to assist client-side foveated rendering;
• and
• transmitting, in response to the request to access the stream of media data, the initial portion of media data and the time metadata track,
• wherein the initial portion of media data comprises a portion of the omnidirectional media content for a viewport that is foveated rendered or to be displayed using foveated rendering on the client device according to the request.